Correct option is A
· A suspension insulator, which is also known as a strain insulator, is a type of insulator designed to protect the overhead power line.
· The insulating materials for this insulator comprise discs connected to each other by string-like metal links.
Types of Suspension Insulator:
· Cap and Pin Type
· Hewlett or Interlink Type
Advantages of Suspension Type Insulator:
· Each unit operates the voltage of about 11kV and hence depending upon the voltage the appropriate number of discs are connected in series with the string.
· If one of the units is damaged, then it is replaced by the new one and hence no need of replacing the whole string.
